Question 1

Can the molecule shown below be properly described as a meso compound?

Accepted Answer

The answer of Can the molecule shown below be properly...

Question 2

What term describes the structural relationship between cis-1,2-dimethylcyclopentane and trans-1,3-dimethylcyclopentane?

Accepted Answer

A)  not isomers 
B)  constitutional isomers 
C)  enantiomers 
D)  diastereomers 
E)  conformers 
A)  not isomers 
B)  constitutional isomers 
C)  enantiomers 
D)  diastereomers 
E)  conformers

Question 3

How many enantiomers are there of the molecule shown below?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  6 
A)  0 
B)  1 
C)  2 
D)  3 
E)  6

Question 4

Circle each chiral molecule among those shown below.

Accepted Answer

The answer of Circle each chiral molecule among those shown...

Question 5

Which of the following terms best describes the pair of compounds shown: enantiomers, diastereomers, or the same compound?

Accepted Answer

The answer of Which of the following terms best describes...

Question 6

Use the following three structures to answer the two questions below.  
-The relationship between I and II is: ________.

Accepted Answer

A)  same compound 
B)  enantiomers 
C)  diastereomers 
D)  constitutional isomers 
A)  same compound 
B)  enantiomers 
C)  diastereomers 
D)  constitutional isomers

Question 7

Would a 50/50 mixture of the two compounds below be optically active? Briefly explain your answer.

Accepted Answer

No. The two compounds are enan

Question 8

Is the molecule shown below chiral or achiral?

Accepted Answer

The answer of Is the molecule shown below chiral or...

Question 9

(-)-Lactic acid has a specific rotation of -3.8°. What is the specific rotation of a solution containing 7.5 g of (-)-lactic acid and 2.5 g of (+)-lactic acid?

Accepted Answer

The answer of (-)-Lactic acid has a specific rotation of...

Question 10

Assign the proper configurational label, R or S, to each chiral carbon in the molecule below.

Accepted Answer

The answer of Assign the proper configurational label, R or...

Question 11

Which of the following terms best describes the pair of compounds shown: enantiomers, diastereomers, or the same compound?

Accepted Answer

The answer of Which of the following terms best describes...

Question 12

Label each asymmetric carbon in the molecule below as having the R or S configuration.

Accepted Answer

The answer of Label each asymmetric carbon in the molecule...

Question 13

A mixture of two enantiomers with a composition of 65.0% R has an observed rotation of -25.3° in a   polarimeter tube. If the mixture has a concentration of 2.038 g/mL at 25°C, what is the predicted  
Of an optically pure sample of the S enantiomer?

Accepted Answer

A)  -25.3° 
B)  -53.5° 
C)  +12.4° 
D)  +41.3° 
E)  +53.5° 
A)  -25.3° 
B)  -53.5° 
C)  +12.4° 
D)  +41.3° 
E)  +53.5°

Question 14

How many asymmetric carbon atoms are present in the molecule shown?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  4 
A)  0 
B)  1 
C)  2 
D)  3 
E)  4

Question 15

Label each asymmetric carbon in the compound below as R or S.

Accepted Answer

The answer of Label each asymmetric carbon in the compound...

Question 16

The boiling point of S-2-butanol is 99°C. What is the boiling point of R-2-butanol?

Accepted Answer

A)  99 C 
B)  0 C 
C)  -99 C 
D)  150 C 
E)  You can't tell from the information given. 
A)  99 C 
B)  0 C 
C)  -99 C 
D)  150 C 
E)  You can't tell from the information given.

Question 17

How many enantiomers are there of the molecule shown below?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  6 
A)  0 
B)  1 
C)  2 
D)  3 
E)  6

Question 18

How many diastereomers are there of the molecule shown below?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  6 
A)  0 
B)  1 
C)  2 
D)  3 
E)  6

Question 19

How many asymmetric carbon atoms are present in the following compound?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  4 
A)  0 
B)  1 
C)  2 
D)  3 
E)  4

Question 20

What is the structural relationship between the two molecule shown below?

Accepted Answer

A)  constitutional isomers 
B)  enantiomers 
C)  diastereomers 
D)  conformational isomers 
E)  not isomers 
A)  constitutional isomers 
B)  enantiomers 
C)  diastereomers 
D)  conformational isomers 
E)  not isomers

Exam 5: Stereochemistry

Can the molecule shown below be properly described as a meso compound?

What term describes the structural relationship between cis-1,2-dimethylcyclopentane and trans-1,3-dimethylcyclopentane?

How many enantiomers are there of the molecule shown below?

Circle each chiral molecule among those shown below.

Which of the following terms best describes the pair of compounds shown: enantiomers, diastereomers, or the same compound?

Use the following three structures to answer the two questions below. -The relationship between I and II is: ________.

Would a 50/50 mixture of the two compounds below be optically active? Briefly explain your answer.

Is the molecule shown below chiral or achiral?

(-)-Lactic acid has a specific rotation of -3.8°. What is the specific rotation of a solution containing 7.5 g of (-)-lactic acid and 2.5 g of (+)-lactic acid?

Assign the proper configurational label, R or S, to each chiral carbon in the molecule below.

Which of the following terms best describes the pair of compounds shown: enantiomers, diastereomers, or the same compound?

Label each asymmetric carbon in the molecule below as having the R or S configuration.

A mixture of two enantiomers with a composition of 65.0% R has an observed rotation of -25.3° in a polarimeter tube. If the mixture has a concentration of 2.038 g/mL at 25°C, what is the predicted Of an optically pure sample of the S enantiomer?

How many asymmetric carbon atoms are present in the molecule shown?

Label each asymmetric carbon in the compound below as R or S.

The boiling point of S-2-butanol is 99°C. What is the boiling point of R-2-butanol?

How many enantiomers are there of the molecule shown below?

How many diastereomers are there of the molecule shown below?

How many asymmetric carbon atoms are present in the following compound?

What is the structural relationship between the two molecule shown below?

Structure and Bonding

Acids and Bases; Functional Groups

Structure and Stereochemistry of Alkanes

The Study of Chemical Reactions

Alkyl Halides; Nucleophilic Substitution

Structure and Synthesis of Alkenes; Elimination

Reactions of Alkenes

Structure and Synthesis of Alcohols

Reactions of Alcohols

Infrared Spectroscopy and Mass Spectrometry

Nuclear Magnetic Resonance Spectroscopy

Ethers, Epoxides, and Thioethers

Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy

Aromatic Compounds

Reactions of Aromatic Compounds

Ketones and Aldehydes

Amines

Carboxylic Acids

Carboxylic Acid Derivatives

Condensations and Alpha Substitutions of Carboxyl Compounds

Carbohydrates and Nucleic Acids

Amino Acids, Peptides, and Proteins

Lipids

Synthetic Polymers

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